Zeta, S, ES Series Step Motors Discontinued & Suggested Replacements

The S, ZETA and ES series stepper motors were discontinued in 2022.

These were all the same step motors and had a 10-foot cable as standard. The ZETA motor came with a ZETA drive connector on the end (screw-terminal), the S motor came with a S drive connector on the end, and the ES step motor had no connector.

Basic Parts numbers

All custom products based on the above parts are also discontinued, for example:

CP*S57-51-XXXXX CP*ZETA57-51-XXXXX CP*ES21B-XXXXX

Suggested Replacements

The HV motors are the best choice for replacing the ES/ZETA/S motors, offering higher torque, better lead times and more competitive pricing. Below is a recommended cross-over chart to the closest equivalent HV motor. Rated current of the motor should be reviewed against the available current from the stepper drive. Speed torque curves linked below should be compared to evaluate potential performance differences.

ES/ZETA/S Motor specifications and Speed Torque Curves

LV/HV Stepper Motor Specifications and Speed Torque Curves

HV Crossover Chart

This chart shows the ES, S, and ZETA motor with shared characteristics along with the recommended HV replacement. See the notes column and associated footnotes that summarize mechanical differences

1. HV23x-02-10 : Double shaft with a single flat

2. HV23x-01-10 : Single shaft with a single flat

3. HV23x motors are not available with keyways

4. -E or -EC models include a 1000 lines encoder. HV23x motors can be supplied with a similar 1000ppr encoder. Request through a local distributor as a custom product.  Please note the HV motors with encoder will have a 10 piece MOQ required per shipment and so in many cases if an encoder is required, converting the system to a servo solution may be the better option.

5. HV34x-02-10 : Double shaft with a double flat

6. HV34x-01-10 : Single shaft with a double flat

7. HV34x-04-10 : Double shaft, round

8. HV34x-03-10 : Single shaft, round

9. HV34x motors are not available with keyways

10. 10. -E or -EC models include a 1000 lines encoder. HV34x motors can be supplied with a similar 1000ppr encoder. Request via Extranet Quote system, Custom Electronics

NEMA23 : ES2x, S57-xx, ZETA57-xx models

NEMA34 : ES3X, S83-xx, ZETA83-xx models

ZETA Systems

ZETA part numbers that do not include -MO indicate a motor plus ZETA4 drive system. For example, ZETA57-51 includes ZETA4 and ZETA57-51-MO. The ZETA4 drives were discontinued as of 2024.

The programmable single-axis ZETA6104, ZETA6108, OEMZL6104 and OEMZL6108 and SX6 and SX8 are no longer available. If looking for a single-axis drive replacement, users may want to consider the IPA servo drive controller with a servo motor:

Related FAQ: S/SX Motors - Replacing S/ZETA/ES series step motors with BE servo motors

Complete List of Discontinued Parts